Sigelei 150w

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Baditude

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Apr 8, 2012
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Just out of curiousity and for bettering my knowledge,why do the batteries I put in a dual battery box mod have to be married, and why can't I put one in a single battery device? What would happen if I did? Would it damage the mod or something? Thank you

In some mods, you can fit two 18350's when the mod is configured for an 18650. Or two 18650 batteries if the mod is designed for this. This boosts the voltage output from 3.6V to 7.2V. Yay! BUT, you should probably never do this. Unless you are familiar with matching batteries, you are only endangering yourself and others. You may think, "Well, shucks, laptops have multiple batteries in them, why can't my e-cig?"

Laptop batteries are specifically designed for stacking and are paired for use at the factory. When using un-matched batteries, they will discharge and provide current at different rates. This means one battery will continuously take more of the stress than the other. You may not notice any trouble at the start, but as the batteries age with use the problem will become more severe. Push the batteries a bit further and now you've entered the realm of thermal runaway. Downside being that one battery entering thermal runaway will push the other battery into thermal runaway. Now you have two small, flaming explosives only inches from your face.

For those who choose to stack batteries in series anyway, its a little safer to match, pair, or "marry" the batteries so that the above situation is decreased. This implies buying two new, exact same batteries with the same specs, marking them as a pair, and alternating the order that they are placed in the mod each and every time. Stacking batteries is considered to be more risky for a mechanical mod than a regulated mod.

Serial vs Parallel Dual Battery Mods
Some mods are designed to use two 18650 batteries simultaneously. Series (batteries stacked end to end) will double the voltage output, but the capacity (mah) and amps will stay the same as using only one battery alone. Parallel (side by side) batteries will double the amp and mah capacity. Serial and Parallel Battery Configurations
 
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Completely Average

Vaping Master
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Jan 21, 2014
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This is what I would suggest.

First, take the mod to a vape shop when the mod is having the problem. Any vape shop will do.

Explain the problem you are having and ask one of the employees to put their tank or RDA on it and take some puffs. See if they get the same problem with their atomizer as you get with yours.

If they do you've immediately eliminated the atomizer as the problem. This being the problem is unlikely, but it's the one part you can easily troubleshoot for free.


Unfortunately the next step is to try new batteries which really means you need to buy new batteries. You don't want to use someone elses.

If you still have the same problem with new batteries then the problem is obviously the mod.
 

speedy_r6

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Apr 25, 2015
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If you were running at too high a power, they may not have been able to output that. The Sig 150 doesnt step voltage up. If your batteries are putting out 7.4v(about what mine are at when my screen tells me they are at 60%) and you are trying to draw 7.5v, it is going to tell you to check the battery.
 

lovemytank

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Jun 9, 2015
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You can keep on using the current batteries in single mech mods, maybe. When you get your charger, charge them up and use for a few hours then test voltage again. If dropping really fast comparatively retire them. I have read several placed that the MXJO batteries are cheap rewraps. I own several and they work well but the 25rs are great!
 
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